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Operating Instructions and Owner’s Manual
Mr. Heater | MH14TC Gas-Fired Infra-Red Portable Heater
1. general inFOrMatiOn
A. The Mr. Heater MH14TC is a high pressure propane
appliance and is designed to be connected to a bulk
propane tank. Every unit is tested during manufacturing
and shipped fully assembled except AS NOTED.
b. Intended use of this heater is primarily the temporary
heating of buildings under construction, alteration or
repair.
C. Installation of heater must conform with local codes
or in absence of local codes, with the Standard for the
Storage and Handling of Liquefied Petroleum Gases,
ANSI / NFPA 58 latest edition.
Natural Gas and Propane
Installation Code, CSA B149.1;
D. This heater is equipped with an automatic Safety Shutoff
Valve. The gas flow will automatically stop if the heater
fails to operate for any reason.
E. Maximum safety and convenience have been built into
the Hi-Med-Lo Control Valve/Regulator. The following
table lists the approximate BTU’s consumed and the
operating hours you can reasonably expect from bulk
propane cylinders.
Valve position
Btu input
cylinder 20 lb.
Hi
14,000
30 hours
Med
11,500
37 hours
Lo
10,000
42 hours
Figure 1.
F. 12 P.S.I. minimum inlet gas supply pressure for the pur-
pose of input adjustment.
G. Maximum inlet supply pressure is 120 P.S.I.
H. Heater area to be kept clear and free from combustible
materials, gasoline, and other flammable vapors and
liquids.
I. Flow of combustion and ventilation air must not be
obstructed.
J. The heater should be inspected before each use and at
least annually by a qualified service person.
K. Hose assembly shall be visually inspected prior to each
use of heater. If it is evident there is excessive abrasion
or wear, or the hose is cut, it must be replaced prior to
the heater being put into operation. Replacement hose
assembly shall be Mr. Heater hose assembly as listed in
the parts list.
L. When heater is not in use, turn off the LP gas supply at
the LP gas cylinder.
M. See your local dealer or contact Mr. Heater Corp. for re
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placement parts or information pertaining to this heater.
Generic part replacement may also void your warranty.
N. The minimum ambient temperature rating for this heater
is 20°F.
2. FOr saFe OperatiOn
A. READ INSTRUCTIONS CAREFULLY: Read and adhere to
these instructions. Do not allow anyone who has not
read the instructions to assemble, light, adjust or oper
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ate the heater.
warning:
Keep the heater out of the reach of children.
B. PROPANE IS VERY FLAMMABLE: In the event of a leak,
propane will accumulate and the possibility of a fire is
present. Propane gas is scented and its strong odor is
readily detectable. Never strike a match or bring any
flame or create an electric spark in an enclosure when
you smell propane gas. Ventilate the area thoroughly,
move the heater outside, find and correct the source of
the leak before attempting to light any appliance. If you
are unsure of these instructions evacuate immediately
and call for help.
C. GAS LEAKAGE: If the leak cannot be corrected, do not
tamper with the heater, follow the shut down instruc
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tions and return the heater to the dealer or address
given on front page.
warning:
Do not use this heater on bulk tanks of greater capacity
than 20 pounds LPG (50 pounds water capacity).
D. LEAK DETECTION: Before each use of the heater check
all fittings and connections with a soap solution to
be sure there are no leaks. Be sure the POL fitting is
wrench (7/8”) tightened into the on-off valve on the
propane cylinder. NEVER, NEVER USE ANY FLAME FOR
LEAK TEST.
E. CONNECTING HEATER TO PROPANE CYLINDER: Always
connect the heater to the bulk cylinder in the out-
doors or in a well ventilated area. Use a 7/8” open end
wrench. NEVER connect this heater to a cylinder near an
open flame.
F. USE OF HEATER: Always operate the heater with the
propane cylinder in an upright position on a level non-
combustible surface. NEVER place the cylinder on its
side when operating the heater.
G. ATTEND HEATER: Do not leave heater unattended while
it is in operation.
H. ALWAYS USE A MATCH TO LIGHT HEATER: NEVER at
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tempt to light the heater with a spark lighter.
I. DO NOT TAMPER: Should the heater not perform prop
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erly, such as little or no heat when operating in the “Hi”
position, or for any other reason, DO NOT ATTEMPT
TO REPAIR OR TAMPER with the heater. Any tampering
could make the use of the heater unsafe and danger-
ous. Return the heater to the dealer or the address given
on front page for repair or replacement.
J. FOR STORAGE: The heater Hi-Med-Lo-Off regulating
valve should always be turned to “off” when the heater
is not in use. Allow at least 15 minutes for cooling be
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